Barrel distortion
A lens aberration that causes straight lines at the edges to bow outwards giving a barrel-like form
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Barrel effect correction
Many cameras with zoom lenses suffer from barrel distortion. The effect causes images to be spherised at their center and it occurs at the wide end of a zoom lens.
Barrel distortion
Techniques Glossary Barrel distortion
A lens aberration that causes straight edges to bow outwards, giving a barrel-like appearance.
Barrel Distortion
Image distortion produced when the position of the camera lens is at its widest angle. Lines you expect to appear perpendicular are not.
Barrel Distortion
As previously spotted on some Japanese sample shots the 950 does indeed suffer from barrel distortion at it's widest angle (38mm).
Barrel Distortion - If you take a photo of a seascape with a wide-angle setting and the horizon seems to curve in the image, you've been hit by 'barrel distortion'.
Barrel Distortion
Straight lines are bowed in at the edges of the picture frame re sembling the sides of a barrel; pres ent in small amounts in some wideangle or wideangle-zoom lenses, bu~ uncorrected in fisheye lenses.
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Barreling
A distortion which occurs with wide-angle zoom, in which straight lines at the edges curve toward the center, giving the image a barrel-like appearance.
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barrel distortion noun
a type of image distortion in a rectilinear projection where scale increases with increasing distance from the center of the image.
Barrel Distortion A lens effect in which the straight lines in an image appear to be inflated or sphere shaped. Bellows Attachment A flexible, light-proof enclosure placed between the camera and the lens for close-up and macro photography.
Barrel Distortion - This is distortion caused by the lens, that causes the outer edge of image bow outward.
Barrelling
Barrelling occurs when images are 'spherised' at their center. It is most noticeable when a very straight edge is near the side of the image edge.
Barrel distortion
Lens aberration (distortion) where straight lines are formed as curved lines in the image. These barrel shaped lines are most noticeable along the edges of the photo.
(see Aberration & Pincushion effect ) ...
BARREL DISTORTION - Image distortion caused by a lens, where the edge bows outwards like a fisheye or wide-angle lens's image.
barrel distortion
This is an optical distortion common to wide angle lenses where the centre of the image appears larger than the edges. With rectangular camera formats this distortion gives rectangular subjects a barrel shape.
Barrel Distortion - A common geometric lens distortion causing an acquired image to pucker toward the centre and be "rounded" along the outer edges.
Barrel Distortion
Barrel Distortion is a problem associated with wideangle lenses whereby the image appears distorted outwards.
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barrel distortion
image effect that spreads the center dimensions of the picture.
Barrel Fold: Folding a sheet two or more times in the same direction.
Base Alignment: Arrangement that allows columns of text to fall on the same line across the page, regardless of varying sizes of the elements in the columns.
Barrel Edit
The barrel is the tube-shaped outer shell that contains the lens elements.
10-blade diaphragm as aperture of a Robot ...
Lens Barrel
A Lens Barrel is the outer casing of a camera lens, having all the manual lens controls on it - f/stop or aperture control, focus ring, and (at times) critical focus marks.
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Lens barrel
A metal or plastic tube with a blackened inner surface, in which the lens elements and mechanical components of the lens are mounted.
Barrel distortion:
One of the common lens aberrations, where straight lines at the edge of the field are caused to bend into the shape of a barrel.
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Barrel distortion is easily noticed when shooting any architecture or any other subject where there are straight lines present ...
Barrel distortion, which gives the appearance that buildings lean inward, was caused by use of widest end of zoom lens. Zooming in will minimize or eliminate the effect.
Can be fixed with image editing software.
Barrel Distortion
This results in a picture that appears to be pulled toward the center within a circular framing.
barrel
Apart from these design related problems there're also distortions due to perspective which are most obivous with wide angle lenses. If you shoot an object other than on the same high it gets distorted.
Barrel Distortion
Lens distortion causing straight lines to "barrel" out; the opposite effect is Pincushion Distortion. Fairly common to some extent in cheaper lenses (and some expensive ones).
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The front barrel removed from the lens' body. Note the clearly visible rear element retaining ring.
Separate the front barrel from the lens body. This will lift out easily. Now turn this upside down, and we're going to go to the rear of this.
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Last, the lens barrel has reflected against the inside of the dome (see arrows above). What you see in your photograph is the shiny front rim on your lens. This is typical of some lenses under some lighting conditions.
The world reference barrels are:
Brent Crude, comprising 15 oils from fields in the Brent and Ninian systems in the East Shetland Basin of the North Sea. The oil is landed at Sullom Voe terminal in the Shetlands.
An iris diaphragm is an adjustable device that is fitted into the barrel of the lens or shutter housing. It is called an iris diaphragm because it resembles the iris in the human eye (fig. 4-12).
Some hoods fasten to the very end of the lens barrel by means of a bayonet (rotating and locking) mount and others clip further down the barrel to a small ring by means of small spring-loaded plastic clips in the hood.
This applies to the barrel of the lens, especially if it’s a zoom.
If you've ever watched Moose closely while he's photographing wildlife with his 400 or 600 you may have noticed his left hand madly moving back and forth on the lens barrel and wondered what that was all about. He's using the M/A mode on the lens.
I find it is OK with short barrel lenses. My main lens is the EF 100-400mm and the flash is so close to the body that the lens barrel blocks some of the flash.
Some zoom lenses even have curved lines along their barrel that form an aperture scale for their focal length range. If you have a lens with a scale, you can use a simple procedure to focus at the hyperfocal distance.
Using a lens specifically designed for close work and with a long barrel for close focusing, called a macro lens.
For example, optical imperfections within a lens may cause distortions such as barrel distortion or pincushioning.
It's body is somewhere in between the size of those two cameras, though it's lens barrel sticks out a bit further. Probably owing to the fact that larger optics are required to create an image circle that will cover the larger sensor.
Barrel distortion: Distortion of the image where straight lines in the subject are formed as curved lines. It is most noticeable along the edges of the frame.
Bellows: Light-tight folding sleeve in view cameras that connects the lens to the body.
Distortion - Drag to the right to correct barrel distortion and straighten lines that bend away from the center. Drag to the left to correct pincushion distortion and straighten lines that bend toward the center.
One unintended distortion that's pretty common today is barrel distortion where straight lines away from the center of the photo bow outward (less common is pincushion distortion where the lines bow inward).
Average DSLR lenses have a certain degree of barrel distortion, which essentially means that the image will begin to stretch at the edges.
The MP-E 65 macro lens has Canon's standard 'macro light' flange on the end of the lens barrel (58mm filter size) for the ring light to clip on. The MP-E 65 has reproduction ratios and focusing distances printed on the lens barrel.
Most common are barrelling and pincushioning. Barrelling occurs when the edge of an image bows toward the outside of the image. The image appears to have been stretched on a spherical surface.
F/stop-A metal plate or diaphragm that controls the amount of light entering a lens barrel. In most cases, the diaphragm is iris shaped. The larger the hole in the diaphragm, the smaller the f/stop number. For instance, f/1.
If the camera is too close to a flat subject, and a wide-angle lens is used, the subject may show barrel distortion. This is most obvious in subjects with straight lines or edges that fall near the edges of the image.
In a baby shoot, for example, you will be able to put your baby on an old fashioned scale, or inside an oak barrel. For family portraits, there are all sorts of background - each with a different effect.
With the camera fixed to a solid tripod, try operating the zoom barrel during a long exposure of a second or more.
Fine sand particles can get inside camera bodies and lens barrels and wreak havoc with your camera's mechanics and optics. This is not just a problem when you're taking some pictures down on the beach. It was a major headache in the 1991 U.S.
Only his arm and camera were in the barrel of the wave. 'Your hand is your eye, because you're not looking through the viewfinder,' he says. 'Having your hand at the proper angle is crucial.
Three common types of optical distortions that exist, particularly in wide angle lenses, are: Barrel distortion (where straight lines seem to bow out, as if around the sides of a barrel), Chromatic Aberration (where blue fringing is present), ...
Place the palm of your hand on top of the barrel of a long lens and lean on it, pressing hard with the hand above, where the tripod collar is attached.
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An alternative is to place a bean bag -as shown above- instead of your hand.
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Another aberration, Distortion, affects the shape of the image (pincushion and barrel distortion) , but not the sharpness. It makes staight lines look "bowed" near the edges of the image.
For precise DOF, use the preview mode or program found on many SLRs, check the scale markings on the barrel of some lenses, or use a hyperfocal chart. No DOF modes, guides, or charts?
Instead of a prism in the camera, Nikon's VR (Vibration Reduction) lenses use sensors to move a lens element within the barrel of the lens.
Despite its super wide field of view, I was positively surprised how little barrel distortion this lens showed. I barely ever correct the distortion.
A specialized lens for architectural photography, with perspective control through barrel lateral shifting relative to the film or sensor plane, eliminating the need for the camera to be tilted, to maintain vertical lines parallel, ...
The aperture ring. This is a narrow rotating ring on the barrel of the lens. It is generally located close to the body of the camera.
The focusing ring. This will be a wider ring located near the front of the lens.
 See also: Camera, Image, Lens, Focus, Digital
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